Exhaust gas heater



-Y y 1,63 85 June- Z8, 1927. c- FORTH 3, 3

" EXHAUST GAS 'HEATERA Filed 'Septlm '192s 2 sheets-sheet '1 1 @iig/[lfm l June 28, 927V. C FRTH EXHSTGAS HEATER Filed Sept. 10, 1923 2 Sheets-Sheet 2 `Patented June 28, 1927.

UNITED .STATE-s.

PATENT OFFICE,

' CHARLES FORTH, OF `DETROIT, `MICH`IGAN, yASSIGNOR T0 CAIITAL 'MAIWUFACJJURIN'G` CO., 0F DETROIT, MICHIGAN, CORPORATION 0F MICHIGAN.

f EXHAUST `GAS 'HEATER.

Applicationled'septemher 105.1928.. Serial No. 661,896.

This invention relates .to lexhaust heaters torinotor cars. The .object of the invention istoprovide an iinprovedheater of. this typeprovded. with ypassagevv.ays tor, adequate l.circulation around the .pipi-Ls.y The gri-d or slotted footplateis so designed that when it rests ontheheating coils itdivides the heater into two passageways, one yWhich takes in fthe 'air .and the other delivers. the heatedvairAk This .-aiiords .ai-r` circulation which is absolutely necessaryto :get etfective heating operation. As is Well known in .the operation.. of furnaces in. houses, without free and .adequate circulation of a. large quantity oat -air the furnace willnot properly heat the house, and :the same istruein heating "the inte-rior :of .af-car. Y

Most of the rad'ators th t are cars at the present time have no adequate pro-visionifor secu-ringY proper .circulation of the'air. The consequence is vthat vunder orf .dinary city running speed very. little heat is derived from thern. Clonsequently, they are very ineifective. It is the objecto the present invention. to overcome this aultfand -secureyan effective circulation by` a simple arrangement.

The heaters that are now used inautoinohiles are provided .with dust pans tor collectingdust and trash and also provided with doors by. which thisinay be dropped .out ot .the pan. However, so far as I ain aware, .these doors `have no means which they canbe controlled from above the floor of the car. I have not .only provided anon trol, but one which vis sunk-in the grid when not in'use or notto -be Iin the Way.

In the'drawings:

Fig. l is a fragmentary perspective View of the interior of .a sedan.'` v

Fig. 2 is a longitudinal 4section of my improvedl heaterV takenon .the line 2-2of Fig. 3 is a cross section of the `saine taken .on the line 3-3 of F 2.

Fig. 4l is a .plan view of the heatingpipes. .-Fig. ois an inverted plan viewof the heater showing .the pan .doors taken .on the line 5-5 of. Fig. 2.

The grid is a castingdesignated .aand provided With the usual parallel bars and slots, but of course, `the exact/design and used .in the pattern of the. grid is immaterial.. However,..-a large portion of thegridv is raised up from the. ioor .flange l). -This has a double purpose.` One is to fornil a conven,- ntfoot resti for the occupants vof the ,seat and the other is for the purpose .of affording an adequate intake passage all, aroiundthe outside of the grid.` Openings care pro- Vided 'for taking in air. `All around the grid 1s. 'a depending flange d adapted. t0 rest on the top .of the copper heating elementso as to divide the lspace below the top of the grid into an intake cham-ber and ai heatedair delivery chamber. e l

The .heating` element or pipes are formed by a pair of sheet copper stainpingse .and f,

which are locksea1ned together.. These.

stampings of i course, are relativelyv cheap 'to manufacture and beingv inade of copperv .or .any other suitable metahthe heat `conducitivity isrelatively'large. The lower stamping isforrned with a :pairof nipple portions Lf-.IL adapted to lit over the nippleinserts g .by being brazed .tothe shoulder formed by the. expanded ring y'. This expanded ring portion provides :a second or lower shoulder which `i-s f `adapted Vto rest,` onl the shoulder la provided inthe stamped metal pan. vThis shoulder is provided :around =thezorifices thro-ugh' Whichthe nipple inserts areV intended .to pass. yThe lower portiony of the nipple inserts are externally screw threaded to ytake the elbows which .can be. ,screwed onto these threadsand which at their other ends can take the flexible pipe or hose intended to .convey .the exhaust lgases. It will be noted .that the vstamped metalpan is Y The pair of door openings, guarded by the spring 1 closed doors p. These .doors each have a pair Aof knuckle eyes g. The bottom ofthe pan also hastxvo pairs Aof knuckle veyes r; the'pintles Vare .threaded .through theseknuckle. eyes andv .the .torsion `springs tare `coiled around .thel

spindles and tend to keep the doors tightly closed. lit is not broadly new to provide doors in the bottom of the' pan and keep them tightly closed by springs, but l do believe that my control is a new and better arrangement for operating these doors than has heretofore been suggested. The grid is provided with an integral downwardly projecting sleeve u, adapted to take the spindle fv on the end of which is pinned a double crank fw. This spindle may be shifted up and down in the sleeve a." The position shown in Fig. 3 is the lower position with the crank handle m sunk below the level of the top surface of the grid in the socket y. This keeps the crank handle out of the way yetl in a position where it may be easily grasped for operation. lfirhen it is desired to dump the contents of the pan, the handle is grasped and the spindle may be raised due to the fact that the crank is somewhat spaced from the lower end of the spindle and the fact that it has flexible connections in the wire links e which connect with the lugs l, soldered to the doors. Alllfhen the crank is turned in either direction, it obviously pulls in on both the links 'e and thrusts the doors open, allowing the refuse to be dumped.

The feature that want to emphasize in particular is the simple circulatory arrangeinent of the grid provided with the depending flange which rests upon the top of the heating element. This requires the air to be taken in at the sides of the heating element where it can be taken inl for the reason that the rising heat does not stop the down draft of air. The air flows down all around the outside of the heating element and down under the heating element, rising in the center of the heating element-through the slots 2; After having become thoroughly heated by its being trapped for some time under the bottom of the heater it will flow through the grid, being retarded bythe web portions of the web. This forms a simple circulation which is both adequate and efficient.

Vhat I claim is:

l. In an exhaust heater, the combination of a grid and a pan forming a housing, an exhaust gas heat-ing element comprising a plurality of separated pipes united by a header, said heating element supported in the pan, and a. depending flange depending from the bottom of the grid and resting on the heating element to divide theinterior of the housing into an air intake chamber along the margin of the grid and a heated air delivering chamber on the inside of the grid.

2, An exhaust heater comprising a pan and agrid which form a housing, an exhaust gas heating element within the housing havinv an inlet and an outlet for the passage of ex aust gases therethrough, the said exhaust gas heating element being disposed in the housing so as to provide a space between the element and the grid, and partition means for dividing the space into an air intake closed, a spindle supported in the grid and having connections with the refuse door, and a handle on top of the' spindle by which the spindle may be operated to control the refuse door.

l. ln an exhaust heater, thevcombination of a grid provided-with a depending sleeve portion, a pan supported under the grid and provided with a refuse door, and aA spindle supported in the sleeve having a crank on its lower end and a crank handle on-its upper end, the lower crank having a link connection with the refuse door whereby a turning of the spindle controls the refuse door.

5. ln an exhaust heater, the combination of a housing, provided with a refuse door, said housing provided with a grid having a countersunk socket at the top and with a sleeve, a spindle operating in said sleeve and having a crank handle which may be sunk out of the way into said countersunk socket, and connectionsl between the lower end of the spindle and the door bv which the saine may be controlled.

6. In an exhaust heater, the combination of a housing provided at its upper surface with a grid having a countersunk socket and having a refuse door at the bottom, and a spindle rotatably and slidably supported in said grid and having at its lower end connections wit-h the refuse door and having on its Lipper end a crank handle which may lie in the countersunk socket when not in use but which'perniits the handle of the spindle to be dra-wn from out of the socket and turned to operate the refuse door. Y l

7. In an exhaust heater, the combination of a grid provided with a countersunk socket in its upper surface, a pan supported so as to be suspended below the grid and provided wit-h a pair of refuse doors, a longitudinally movable and rotatable spindle supported on the grid, and a double crank on the lower end of the spindle linked to both refuse doors, whereby a turning of the spindle lwill control the refuse doors.

8. In an exhaust heater, the combination of a grid, a stamped metal pan provided with an opening in the bottom and a nipple iny sert having an expanded ring portion for resting on the shoulder formed around, the opening, a heating element having'a nipple portion adapted to reston the top of the ring portion and secured thereto, and a pipe tting adapted to be secured to the lower Y Vend of the nipple insert.

9. An exhaust heater comprising, a pan and a grid which form a housing, and an exheater7 said means being disposed inwardly haust gas heating element supported within of the outer edge oi the grid whereby the the housing, this element consisting of spaced housing is divided into an outer air intake l0 pipes which are connected at their .ends by chamber and an inner air exhaust chamber.

5 headers to form an unbroken boundary for In testimony whereof he has aiiixed his sigthe heater, and means on the grid for engagnature.

ing with this unbroken boundary of the CHARLES FORTH. 

